I wouldn't say they are more reliable, especially not with cheaper drives that lack proper TRIM support and wear levelling.

Really, I wouldn't put an SSD in anything short of a high end build, as you won't see a benefit worth the price, and an X4 620 ain't a high end build. I'd buy a normal hard drive and put the money into other parts of the computer, more RAM or a better processor, where the money will show more of a benefit.